Oh. So third-party game makers, like Sega and Namco and stuff would be bought by Nintendo, yet they would still make the same games as they always do(for all 3 systems). So then Nintendo could directly profit from sales of those games, is that what you're saying?
That would be a gamble Nintendo's not willing to make, though. They're doing good now, but imagine if they bought, say, Sonic Team(not all of Sega, just them). Then Sonic Team made a game for all 3 systems. And it flopped, Big Time. Now what? Nintendo spent its money on buying and funding Sonic Team and their new game, and they don't even make a profit from it. Then Nintendo's one step closer to the fall the Microsoft and Sony fanboys predicted....